freopen.c

Absolute File Name:

/home/opencoverage/opencoverage/guest-scripts/coreutils/src/gnulib/lib/freopen.c

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Source

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/* Open a stream to a file.

This program is free software: you can redistribute it and/or modify

it under the terms of the GNU General Public License as published by

the Free Software Foundation; either version 3 of the License, or

(at your option) any later version.

This program is distributed in the hope that it will be useful,

but WITHOUT ANY WARRANTY; without even the implied warranty of

MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the

GNU General Public License for more details.

You should have received a copy of the GNU General Public License

along with this program. If not, see <https://www.gnu.org/licenses/>. */

/* Written by Bruno Haible <bruno@clisp.org>, 2007. */

/* If the user's config.h happens to include <stdio.h>, let it include only

the system's <stdio.h> here, so that orig_freopen doesn't recurse to

rpl_freopen. */

#define _GL_ALREADY_INCLUDING_STDIO_H

#include <config.h>

/* Get the original definition of freopen. It might be defined as a macro. */

#include <stdio.h>

#undef _GL_ALREADY_INCLUDING_STDIO_H

#include <errno.h>

static FILE *

orig_freopen (const char *filename, const char *mode, FILE *stream)

{

return freopen (filename, mode, stream);

executed 182 times by 5 tests: return freopen (filename, mode, stream);

Executed by:

dircolors
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182

}

/* Specification. */

/* Write "stdio.h" here, not <stdio.h>, otherwise OSF/1 5.1 DTK cc eliminates

this include because of the preliminary #include <stdio.h> above. */

#include "stdio.h"

#include <fcntl.h>

#include <string.h>

#include <unistd.h>

FILE *

rpl_freopen (const char *filename, const char *mode, FILE *stream)

{

FILE *result;

#if (defined _WIN32 || defined __WIN32__) && ! defined __CYGWIN__

char const *null_device = "NUL";

if (filename && strcmp (filename, "/dev/null") == 0)

filename = null_device;

#else

char const *null_device = "/dev/null";

#endif

#ifdef __KLIBC__

errno = 0;

#endif

result = orig_freopen (filename, mode, stream);

if (!result)

!result	Description
TRUE	evaluated 2 times by 2 tests Evaluated by: du shuf
FALSE	evaluated 179 times by 5 tests Evaluated by: dircolors du shuf tsort uniq

2-179

{

#ifdef __KLIBC__

/* On OS/2 kLIBC, freopen returns NULL even if it is successful

if filename is NULL. */

if (!filename && !errno)

result = stream;

#endif

}

executed 2 times by 2 tests: end of block

Executed by:

du
shuf

else if (filename)

filename	Description
TRUE	evaluated 179 times by 5 tests Evaluated by: dircolors du shuf tsort uniq
FALSE	never evaluated

0-179

{

int fd = fileno (result);

if (dup2 (fd, fd) < 0 && errno == EBADF)

dup2 (fd, fd) < 0	Description
TRUE	evaluated 1 time by 1 test Evaluated by: shuf
FALSE	evaluated 178 times by 5 tests Evaluated by: dircolors du shuf tsort uniq

(*__errno_location ()) == 9	Description
TRUE	evaluated 1 time by 1 test Evaluated by: shuf
FALSE	never evaluated

0-178

{

int nullfd = open (null_device, O_RDONLY | O_CLOEXEC);

int err = 0;

if (nullfd != fd)

nullfd != fd	Description
TRUE	never evaluated
FALSE	evaluated 1 time by 1 test Evaluated by: shuf

0-1

{

if (dup2 (nullfd, fd) < 0)

dup2 (nullfd, fd) < 0	Description
TRUE	never evaluated
FALSE	never evaluated

err = 1;

never executed: err = 1;

close (nullfd);

}

never executed: end of block

if (!err)

!err	Description
TRUE	evaluated 1 time by 1 test Evaluated by: shuf
FALSE	never evaluated

0-1

result = orig_freopen (filename, mode, result);

executed 1 time by 1 test: result = orig_freopen (filename, mode, result);

Executed by:

shuf

}

executed 1 time by 1 test: end of block

Executed by:

shuf

}

executed 179 times by 5 tests: end of block

Executed by:

dircolors
du
shuf
tsort
uniq

179

return result;

executed 181 times by 5 tests: return result;

Executed by:

dircolors
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uniq

181

}

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